Phoronix published a review on the AMD A10-7850K Radeon R7 Graphics Comparison
A quote from the article:
The latest benchmarks of the AMD A10-7850K APU to share on Phoronix and to complement yesterday's Windows vs. Linux OpenGL comparison are benchmarks of the APU's Radeon R7 Graphics compared to numerous AMD Radeon and NVIDIA GeForce graphics cards.AMD A10-7850K Radeon R7 Graphics Comparison @ Phoronix
For this day-after-launch benchmarking of AMD's Kaveri on Linux is an OpenGL comparison atop Ubuntu of the Radeon R7 graphics and then using the new APU and pairing it with several different graphics cards. The AMD Radeon graphics cards used for this first comparison were the HD 6450, HD 6770, HD 6870, and HD 7850. On the NVIDIA side was the GeForce GT 240, GT 520, and GTX 550 Ti graphics cards. The comparison was limited to the modern low-end and mid-range graphics cards that I have available on hand.